package cn.wolfcode.service.impl;

import cn.wolfcode.domain.Activity;
import cn.wolfcode.mapper.ActivityMapper;
import cn.wolfcode.mapper.QuestionMapper;
import cn.wolfcode.qo.QueryObject;
import cn.wolfcode.service.IActivityService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
public class ActivityServiceImpl implements IActivityService {

    @Autowired
    private ActivityMapper activityMapper;
    @Autowired
    private QuestionMapper questionMapper;


    @Override
    public void save(Activity activity) {
        activityMapper.insert(activity);
    }

    @Override
    public void delete(Long id) {
        activityMapper.deleteByPrimaryKey(id);
    }

    @Override
    public void update(Activity activity) {
        activityMapper.updateByPrimaryKey(activity);
    }

    @Override
    public Activity get(Long id) {
        return activityMapper.selectByPrimaryKey(id);
    }

    @Override
    public List<Activity> listAll() {
        return activityMapper.selectAll();
    }

    @Override
    public PageInfo<Activity> query(QueryObject qo) {
        PageHelper.startPage(qo.getCurrentPage(),qo.getPageSize()); //对下一句sql进行自动分页
        List<Activity> activitys = activityMapper.selectForList(qo); //里面不需要自己写limit
        return new PageInfo<Activity>(activitys);
    }

    @Override
    public List<Long> selectRelation(Long eId, Long cId) {

        return  activityMapper.selectRelation(eId,cId);
    }

    @Override
    public List<Long> getQuestionByType(Integer count,Integer type) {
        //根据类型获取所有试题的id
        List<Long> ids = questionMapper.selectByType(type);
        //打乱
        Collections.shuffle(ids);
        /*if (count>ids.size()){
            ids.addAll(ids);
        }*/
        //返回所需数量的试题id
        List<Long> randoms = new ArrayList<>();
        for (int i = 0; i < count; i++) {
            randoms.add(ids.get(i));
        }
        return randoms;
    }
}
